{
  "id": "ka-31",
  "name": "Ka-31 (Helix)",
  "aliases": [],
  "domain": "air",
  "country": "RUS",
  "category": "Airborne early warning helicopter",
  "status": null,
  "fielded": 1995,
  "operators": [
    "CHN",
    "IND",
    "RUS"
  ],
  "prolif_count": 3,
  "summary": "The Kamov Ka-31 (NATO reporting name 'Helix') is a military helicopter originally developed for the Soviet Navy and currently in service in Russia, China, and India in the naval airborne early warning and control role. As with all Kamov helicopters except the Ka-60/-62 family, the Ka-31 has co-axially mounted contra-rotating main rotors.",
  "specs": [
    {
      "k": "crew",
      "v": 2,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "length_m",
      "v": 12.5,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "height_m",
      "v": 5.6,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "engine_name",
      "v": "2 x Klimov TV3-117VMAR",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "speed_kmh",
      "v": 250,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "range_km",
      "v": 600,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "ceiling_m",
      "v": 3500,
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Endurance",
      "section": "mobility",
      "v": "2 hours 30 minutes",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Surveillance Radar",
      "section": "firecontrol",
      "v": "E-801E Oko (eye) surveillance radar",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Radar Coverage",
      "section": "firecontrol",
      "v": "360° coverage and can spot aircraft-size target from 150 km range.",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Radar, Surface Ship Identification Range",
      "section": "firecontrol",
      "v": "100 - 200 km",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "Radar Targets",
      "section": "firecontrol",
      "v": "Radar can track 30-40 targets simultaneously",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    },
    {
      "k": "",
      "label": "NBC Protection",
      "section": "protection",
      "v": "Yes",
      "src": [
        "weg-ka-31"
      ],
      "conf": "medium"
    }
  ],
  "payloads": [],
  "variants": [],
  "art": "helicopter",
  "image": null,
  "verified": null,
  "changelog": [
    {
      "date": "2026-10-10",
      "change": "Entry created from the Worldwide Equipment Guide (ODIN), bulk import"
    }
  ],
  "url": "https://www.defensepedia.com/systems/ka-31.html",
  "sources": {
    "weg-ka-31": {
      "title": "Ka-31 (Helix) Russian Airborne Early Warning Helicopter",
      "publisher": "U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)",
      "url": "https://odin.t2com.army.mil/WEG/Asset/Ka-31_Helix_Russian_Airborne_Early_Warning_Helicopter",
      "published": "2026-03-20",
      "tier": 1,
      "checked": "2026-10-10"
    }
  }
}